模拟鼠标点击式密码输入框效果

程序代码
*{font-size:12px;font-family:verdana;color:#339933;}
#contain{margin-left:64px;padding:3px;padding-bottom:7px;border:1px
solid #339933;border-top:7px solid
#339933;width:125px;height:145px;display:none;}
[xmlns] #contain{padding-left:5px;width:113px;}
.nbox,.text{float:left;border:1px solid #339933;border-top:2px solid #339933;}
.nbox{margin:5px;}
.text{margin:5px 4px;}
a{padding:4px 8px;text-decoration:none;line-height:2;}
a:hover{background-color:#ACE89B;}
.text a{padding:5px 4px 4px 3px;}

程序代码
<script type="text/javascript">
function rand() {
return Math.floor(Math.random()*10);
}
var rangenum = new Array();
var tem;
for (var i = 0; i<10; i++) {
rangenum.push(i);
}
for (var i = 0; i<10; i++) {
var a = rand();
var b = rand();
tem = rangenum[a];
rangenum[a] = rangenum[b];
rangenum[b] = tem;
}
function creatnums() {
for (i=0; i<rangenum.length; i++) {
document.writeln("<div class=\"nbox\" ><a
href=\"#\"onclick=\"input("+rangenum[i]+")\">"+rangenum[i]+"</a></div>");
}
document.writeln("<div class=\"text\"><a href=\"#\"
onclick='input(-1)'>退格</a><a href=\"#\"
onclick=\"clearinput()\">清除</a></div>");
}
function input(i) {
var pwd=document.form.pwd.value;
if (pwd.length<8||i == '-1') {
if (i == '-1') {
document.form.pwd.value = pwd.substring(0,pwd.length-1);
} else {
document.form.pwd.value = pwd+i;
}
}
else{document.getElementById('contain').style.display="none";}
}
function clearinput() {
document.form.pwd.value="";
}
function showpad(){
document.getElementById('contain').style.display="block";
}
function hiddenpad(){
document.getElementById('contain').style.display="none";
}
function noinput(){
var pwd=document.form.pwd.value;
document.form.pwd.value = pwd.substring(0,pwd.length-2);
}
</script>

程序代码
<form name="form">
请输入密码
<input type="password" name="pwd" onclick="showpad()"
onkeydown="return false;" size="8">
<input type="button" value=" OK " onclick="hiddenpad()">
</form>
<div id="contain">
<script type="text/javascript">
creatnums();
</script>
</div>